<!DOCTYPE html>
<html>
<head>
    <base href="http://example.com/sample/">
    <meta charset="UTF-8">
    <title>IsIndex Elements - Spider HTML Parser</title>
</head>
<body>

<!-- src -->
<isindex action="relative/action">
<isindex action="/absolute/action">
<isindex action="https://isindex.example.com/action/target.html">

<!-- Ignored: -->
<isindex/>

</body>
</html>